/*
 * Copyright 2011-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.springframework.data.geo;

import java.io.Serializable;

/**
 * Interface for {@link Metric}s that can be applied to a base scale.
 *
 * @author Oliver Gierke
 * @author Thomas Darimont
 * @since 1.8
 */
public interface Metric extends Serializable {

	/**
	 * Returns the multiplier to calculate metrics values from a base scale.
	 *
	 * @return
	 */
	double getMultiplier();

	/**
	 * Returns the scientific abbreviation of the unit the {@link Metric} is in.
	 *
	 * @return
	 */
	String getAbbreviation();
}
